Fuel injecting system valve



1937. H. H. TRIMMER 2088,882

' FUEL INJEGTING SYSTEM VALVE Filed Feb. 5, 1935 Inventar Atf:omel

Patented Aug. 3, 1937 UNITED STATES PATENT OFFICE FUEL INJECTING SYSTEM VALVE Herbert Harold Trimmen Marc Island, Calif. Application February 5, 1935, Serial N0. 5,123

1 Glaim.

The present invention relates t0 new and useful improvements in fuel injecting system va1ves; and it consists in the peculiar and advantageous valve hereinafter described and definitely claimed.

In the accompanying drawing, forming part of this specificationz- Figure 1 is an elevational view illustrative of the valve co-nstituting the preferred embodiment of my invention.

Figure 2 is a view prin.cipally in vertical section through the valve and illustrating the preferred installation thereof.

Referring now to the drawing in detail, it Will be seen that the embodiment of the Invention which has been illustrated is a throttle valve unit which is designated generally by the reference numeral I.

The Installation shown includes a housing 5 having a fuel passage 6 extending therethrough. Fuel is forced through the passage 6 by coacting impellers I of the gear type which are operable in chambers 8 which are provided therefor in the housing 5, said chambers 8, of course, communicating With the passage 6. The impellers 1 are fixed on shaafts 9 and III which are journaled in the housing 5, the former extending from said housing for operative connection in any suitab-le manner With the engine for actuation thereby. Of course the pump may be driven by any suitable means. Packing glands II prevent leakage around the shaft 9.

The housing 5 of the unit I has formed. therein a by-pass which is designated generally by the reference numeral I 2. The by-pass I2 includes spaced, parallel portions A which communicate with the passage 6 on opposite sides of the impellers I and portions B which communicate, ab their outer ends, With the portions A and extend at right angles thereto. As illustrated to advantage in Figure 2 of the drawing, the portions B of the by-pass I2 extend in spaced, parallel overlapping relation to each other and communicate with each other through a passage which is tapered in a manner to provide a valve seat I3. The reference numeral I4 designates a casing which is secured, as a.t I5, on a. projection I6 which rises from the housing 5. Slidably mounted in the casing I4 is a needle valve I'I which is engageable with the seat I 3. A packing I8 is provided for preventing leakage aroimd the 5 needle valve I'I. A spring I9 yieldingly urges the needle valve I'I toward open position. An extension 20 rises from the casing I4 and pivotally mounted thereon is a throttle lever 2I which is operatively engaged with the upper end of the 10 needle valve I'I. Any suitable means may be provided for operating the lever 2I. The lever 2I is engageable with a. stopscrew 22 which is threadedly mounted in the casing HI for adjust- Ing the needle valve I'I. The passage 6 in the 15 pump hou sing 5 is designed to be connected with a source of fuel supply, not shown.

It is believed that the many advantages of the valve constructed in accordance with the present invention will be readily understood, and 20 although a preferred embodiment of the invention is as illustrated and described, it is be understood that changes in the details of C011- struction and in the combination and arrangement of parts may be resorted 1:0 which Will fall Within the scope of the invention as claimed.

What is claimed is:-

A valve for use in fuel injection system comprising a housing having a fuel passage extending therethrough, said passage including spaced 30 parallel portions disposed. in overlapping relation to ea.ch other and a. tapered portion extending between the overlapping portion, an extension on the housing having a bore in alignment with the valve seat, a. needle valve slidably 35 mountecl in the bare, said valve having one end. engaging the valve seat and its opposite end projecting from the extension, a casing enclos- Ing the extension and ha.ving an opening forming a guide for the needle valve, spring means 40 supported by the casing for yieldably maintaining the valve in open position, a support rising from the casing and a manually operated lever pivoted on the support and engaging the valve for moving the same to a closed position.

HERBERT HAROLD TRIMMER. 

